Always very thorough! We bought our house in August and found out we were being overtaken by ants! Both fire ants on one side of the house along with a yard full of mounds plus black ants in several parts of the house. When we had the carpet replaced before moving in, the master bedroom had fire ants and mounds all under the carpet. It was awful! Terminix came was here in 30 minutes and immediately began treating. They have been treating for us since then and we haven't seen any signs of ants in our house or our yard since September. Even now in the Spring, no ant mounds anywhere. They are awesome!